Premium 4ft Pocket Memory Mattress features 30mm of memory foam fitted on 858 pocketed springs that individually respond to your body's movements.The innovative Coolmax fabric draws perspiration away from the skin, keeping you warm in the winter and cool in the summer, ensuring you get a great night sleep. It is recommended that you rotate this mattress regularly to extend its lifespan, keep in mind that this is a no turn mattress. This mattress is 22cm thick and gives you a firm feel, perfect for those who like extra support while they sleep.